p \p\ p=e,
   the sixteenth letter of the english alphabet, is a nonvocal
   consonant whose form and value come from the latin, into
   which language the letter was brought, through the ancient
   greek, from the phoenician, its probable origin being
   egyptian. etymologically p is most closely related to b, f,
   and v; as hobble, hopple; father, paternal; recipient,
   receive. see b, f, and m.
   1913 webster see guide to pronunciation, sectsect 247,
   248, and 184-195.
   1913 webster
see also:
b f m 

labial \la"bial\, n.
   1. phonetics a letter or character representing an
      articulation or sound formed or uttered chiefly with the
      lips, as b, p, w.
      1913 webster

   2. mus. an organ pipe that is furnished with lips; a flue
      pipe.
      1913 webster

   3. zool. one of the scales which border the mouth of a fish
      or reptile.
      1913 webster
see also:
b p w 

mute \mute\, n.
   1. one who does not speak, whether from physical inability,
      unwillingness, or other cause. specifically:
      a one who, from deafness, either congenital or from
          early life, is unable to use articulate language; a
          deaf-mute.
      b a person employed by undertakers at a funeral.
      c a person whose part in a play does not require him to
          speak.
      d among the turks, an officer or attendant who is
          selected for his place because he can not speak.
          1913 webster

   2. phon. a letter which represents no sound; a silent
      letter; also, a close articulation; an element of speech
      formed by a position of the mouth organs which stops the
      passage of the breath; as, p, b, d, k, t.
      1913 webster

   3. mus. a little utensil made of brass, ivory, or other
      material, so formed that it can be fixed in an erect
      position on the bridge of a violin, or similar instrument,
      in order to deaden or soften the tone.
      1913 webster
see also:
p b d k t 

p
     n 1: a multivalent nonmetallic element of the nitrogen family
          that occurs commonly in inorganic phosphate rocks and as
          organic phosphates in all living cells; is highly
          reactive and occurs in several allotropic forms syn: phosphorus,
           atomic number 15
     2: the 16th letter of the roman alphabet
see also:
phosphorus atomic number 15 

p+
     
        "experience with remote procedure calls in a real-time
        control system", b. carpenter et al, soft prac  exp
        149:901-907 sep 1984.